GIMP has a perspective tool that can easily correct images. Here's how to use it and some tips to get the image right.
5.18. Curve Bend
GIMP 2.8 Perspective tool
Perspective correction and cropping (Part 3 of 14) « Tech bytes for tea?
4.8. Lens Distortion
7.5 Project 5: Panoramas
How to Correct Perspective Distortion in Photography? - bizoutsourcingservice
Photo perspective correction with the GIMP - FSDeveloper Wiki
How to Distort Perspective in Illustrator using Transform Tool?
Gimp Online - Google Workspace Marketplace
How to Correct a Photo's Perspective Distortion With GIMP
Why Are My Buildings Falling Over? A Short Guide to Perspective Distortion and Correction in Photography
How to Adjust Perspective in Photoshop - PHLEARN
Automatic perspective correction? : r/GIMP
How to Use the Free Transform Tool in Affinity Photo